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Optineurin modulates mTORC2/AKT/STAT3 signaling to control MHC II expression and adaptive immunity against HSV-1

GSE320160 Mus musculus Expression profiling by high throughput sequencing 4 samples Submitted 2026/03/19 Platform GPL34290
Summary
Herpes simplex virus 1 (HSV-1) infection contributes to immunopathogenic diseases and lacks an effective vaccine. Improving antigen presentation is key to better vaccine strategies and more robust immune responses. Here, we show that OPTN, an autophagy receptor traditionally involved in protein recycling, unexpectedly stabilizes RICTOR (mTORC2), a crucial step in enhancing MHC-II surface expression in dendritic cells. OPTN regulates the AKT/mTOR/STAT3 pathway, with AKT2 isoform playing a central role. Using scRNA-seq and transgenic mouse models, we identify the mechanistic details of this pathway. Dysregulation impairs antigen presentation, weakening immunity and vaccine efficacy. Our findings uncover a novel function for OPTN and highlight its role in coordinating innate and adaptive immune defenses, with implications for vaccine development and immune response modulation in HSV-1 and other viral and bacterial diseases.
Published in
Optineurin modulates mTORC2/AKT/STAT3 signaling to control MHC class II expression and adaptive immunity against HSV-1
Kadam R, Patil C, Feferman L et al. · Cell reports 2026 · PMID 41996245 · doi:10.1016/j.celrep.2026.117263
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Also filed as BioProject PRJNA1426975 and SRA study SRP678687. Searching any of these in the dataset finder brings you back here.

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